Image Info Viewer
Show an image’s format, dimensions, size, aspect ratio and more.
Processed on your device — never uploaded
What Is This Tool?
This tool reports everything the browser can tell about an image file without any server: the detected format from its magic bytes, exact pixel width and height, megapixel count, file size, the simplified aspect ratio, whether it has an alpha channel, and — where readable — the bit depth and whether a JPEG is progressive.
How It Works
Drop an image onto the box or select one.
The details table fills in immediately.
Check dimensions, size and aspect ratio at a glance.
Use the other tools to resize, convert or compress as needed.
Everything runs locally in your browser — the image you choose is decoded onto an HTML canvas on your own device and is never uploaded to a server.
Features
- Real format detected from the file signature
- Pixel dimensions, megapixels and aspect ratio
- File size and bytes-per-pixel
- Transparency (alpha channel) detection
- All read locally in the browser
Common Use Cases
- Confirming an image meets an upload’s size or ratio rules
- Checking whether a file is really a PNG or a renamed JPEG
- Seeing if an image has transparency before converting it
- Getting quick specs for a bug report or asset list
Frequently Asked Questions
How does it know the real format?
It reads the first few bytes (the "magic number") — PNG, JPEG, GIF, WebP, BMP and others each start with a distinct signature — so a JPEG renamed to .png is still reported as JPEG.
Why does the aspect ratio look odd?
It is the width and height reduced by their greatest common divisor. Unusual crops give unusual ratios like 83:50; that is expected.
How is transparency detected?
For formats that support alpha, the tool checks whether any pixel is actually non-opaque, so a PNG with no transparent pixels is reported as opaque.
Does it show EXIF?
No — use the EXIF Viewer for camera metadata. This tool focuses on the file and pixel properties.
Is my image uploaded?
No, everything is read on your device.